1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ugo [173]
3 years ago
15

7x + 2y = 11

Mathematics
1 answer:
enyata [817]3 years ago
6 0

Answer:

x = 1, y = 2

Step-by-step explanation:

7x + 2y = 11 -----Equation 1

Equation 1 × 7:

49x + 14y = 77 -----Equation 2

-------------------------------------------------------------------------------------------------------------

4x - 7y = -10 -----Equation 3

Equation 3 × 2:

8x - 14y = -20 -----Equation 4

-------------------------------------------------------------------------------------------------------------

Equations 3 + 4:

49x + 14y + 8x - 14y = 77-20

49x + 8x = 77-20

57x = 57

x = 57 ÷ 57

x = 1

Substitute x = 1 into Equation 1.

7x + 2y = 11

7(1) + 2y = 11

7 + 2y = 11

2y = 11-7

2y = 4

y = 4 ÷ 2

y = 2

You might be interested in
Need help with math test ASAP please
MaRussiya [10]

Answer:

stop cheating on your tests

Step-by-step explanation:

Brainly is not meant for cheating

6 0
2 years ago
Solve the equation for z^3-z^2-12z=0<br><br> The solutions are z=?, z=?, and z=?
Assoli18 [71]

Answer:

z is equal to 0,4, and -3

Step-by-step explanation:

3 0
3 years ago
An identification code is to consist of 3 letters followed by 2 digits. Determine the following
kirill [66]
Well let's see:

The first letter can be any one of 26 .
       For each one . . .
The second letter can be any one of the remaining 25.
       For each one . . .
The third letter can be any one of the remaining 24.
       For each one . . .
The two digits can be any number from 01 to 98 ...
       except 11, 22, 33, 44, 55, 66, 77, or 88.  (No repetition.)
      There are 90 of them.

So the total number of possibilities is    (26 · 25 · 24 · 90) .

When I multiply that out, I get   1,404,000 .

I don't know how you got your number, so I can't comment on your
method, but I did find something interesting about your number:

If I assume that you did the three letters the same way I did, then
if I divide your number by  (26·25·24), the quotient will show me
how you handled the two digits.

                         1,263,600 / (26·25·24)  =  81 .

That's very intriguing, because it's so close to the 90 sets of digits
that I used.  But I don't know what it means, or if it means anything
at all.
7 0
3 years ago
Read 2 more answers
Nate and Maya are building model cars. Maya's car is 3 inches less than 2 times the length of Nate's car. The sum of the lengths
frez [133]

Answer:

x+2x-3

because nates car is x and mayas is 2x-3

7 0
3 years ago
Helen is putting together a makeup kit for a friend there are 6 Types of eyeshadow and 3 types of mascara to choose from how man
PtichkaEL [24]
She can make 3 since theres only 3 mascaras? and for each makeup kit she can add two eyeshadows and one mascara
6 0
3 years ago
Other questions:
  • Melinda paints 7/8 of a wall in 1 1/6 hours. What part of a wall does she paint in one minute.
    14·1 answer
  • Elena tiene 50 pilas de monedas
    9·1 answer
  • Solve the following system of equations by the substitution method.
    13·1 answer
  • What is a scatter plot
    12·1 answer
  • A building 56 ft high casts a 196-ft shadow. Sarah casts a 14-ft shadow. The triangle formed by the building and its shadow is s
    13·1 answer
  • When Angelina was born, her grandparents deposited $3000 into a college savings account
    15·1 answer
  • Solve for x<br> 1(x-2) = -5.5
    14·2 answers
  • It takes Peter 25 minutes to clean his room. If he finishes cleaning his room at 8:00 P.M., what time did he start cleaning?
    13·2 answers
  • HELP ASAP<br><br> Explains how to evaluate the expression 4x+10 for x=5.
    6·1 answer
  • Riley makes a mistake in step 2 while doing her homework. what was her mistake? startfraction x over x squared minus 5 x 6 endfr
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!